Getting a diagnosis for autistic spectrum disorder (ASD) is important because it will enable the person to gain access to the right services, and treatments, to support their needs.
ASD may be difficult to diagnose as it can vary considerably from person to person. Individuals should be referred to a specialist team who are experienced in diagnosing ASD.
Diagnosing ASD in children
If you think that your child has some of the characteristics of ASD, you should speak with your GP. If they are already in school, you may also want to speak to their teacher or school nurse. If your GP thinks that your child has ASD, they may refer them to see another health professionals such as:
- a child psychiatrist (a doctor who specialises in mental health),
- a paediatrician (a doctor who specialises in children's health),
- a psychologist (a person who studies behaviour), or
- a specialist diagnostic team (a team of professionals with different backgrounds who work together to diagnose an individual).
A specialist will make a diagnosis based on your description of your child, as well as observing their communication skills, and the way that they behave. The specialist may observe your child in a situation that they are familiar with, such as at school or when they are playing with their toys. They may then see how your child deals with new places or meeting new people.
Diagnosis ASD in adults
Some people with autistic spectrum disorder (ASD) will grow up without their condition being recognised but it’s never too late to get a diagnosis. Some may be afraid of the idea of a diagnosis, feeling it will ‘label’ them and limit other people’s expectations. But there are a number of advantages.
Getting a diagnosis of Asperger’s syndrome or another condition on the autistic spectrum will help people with the condition, and their families, to understand what's wrong with them and decide what sort of support they need.
A diagnosis also means the person will be classed as having a disability under the Disability Discrimination Act. This means their employer (if they work) must make ‘reasonable adjustments’ for them in the workplace, such as providing clear written instructions.
Once diagnosed, adults may be able to access autism-specific services, such as supported living services and social groups, if these are available in their area. Services for adults are listed on the Autism Services Directory (links to external site).
If you think you may have a condition on the autistic spectrum visit your GP and explain why. Ask your GP to refer you to a psychiatrist or clinical psychologist. Read tips on how to present your case in Diagnosis: the process for adults on the National Autistic Society (NAS) website (links to external site).
If you're already seeing a specialist for other reasons, then you may wish to ask them for a referral instead. You should be aware that some PCTs may not provide NHS funding for diagnosing ASD in adults.
